Year	Total
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	31990
1990	252500
1991	364700
1992	337000
1993	424000
1994	364500
1995	726000
1996	677400
1997	899100
1998	796600
1999	860000
2000	706900
2001	750300
2002	838100
2003	903000
2004	790500
2005	929100
2006	934300
2007	896000
2008	843000
2009	902900
2010	505500
2011	867500